EP2130289B1 - Electric motor - Google Patents

Electric motor Download PDF

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Publication number
EP2130289B1
EP2130289B1 EP08716008.1A EP08716008A EP2130289B1 EP 2130289 B1 EP2130289 B1 EP 2130289B1 EP 08716008 A EP08716008 A EP 08716008A EP 2130289 B1 EP2130289 B1 EP 2130289B1
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EP
European Patent Office
Prior art keywords
fan
electronic circuit
electric motor
brake
magnets
Prior art date
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Active
Application number
EP08716008.1A
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German (de)
French (fr)
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EP2130289A2 (en
Inventor
Jochen Pfann
Olaf Simon
Christian Wolf
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SEW Eurodrive GmbH and Co KG
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SEW Eurodrive GmbH and Co KG
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Publication of EP2130289A2 publication Critical patent/EP2130289A2/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
    • H02K7/1021—Magnetically influenced friction brakes
    • H02K7/1023—Magnetically influenced friction brakes using electromagnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle

Definitions

  • the invention relates to an electric motor.
  • a fan motor in which a pole ring is angordnet on the fan and in the axial region of the fan an elekttronischen circuit having sensors for detecting the magnetic fields generated by the pole ring.
  • the invention is therefore the object of developing an electric motor with angle-related measured value, the production should be simplified.
  • the object is achieved in the electric motor according to the features indicated in claim 1.
  • the electric motor comprises a brake and a fan, wherein the fan, comprising the base body and provided thereon Fan blade, is made in one piece as an injection molded part and are provided in the fan encapsulated permanent magnets, wherein axially spaced from the fan, an electronic circuit is provided, which is fastened by means of holding means on the motor flange which is connected to the stator housing of the motor.
  • the advantage here is that the magnets are already introduced in the production of the injection molding of the fan and thus the fan in a simple manner produced, the magnets can be protected and by selecting the magnets as permanent magnets very strong magnetic fields can be generated.
  • the electronic circuit is closely predictable on the fan and thus achieves a good signal-to-noise ratio.
  • the electronic circuit is durable by means of the holding means on Motorflansch and therefore fastened to a fixed stable part of the engine. In addition, thus a very good electrical ground connection is given.
  • the holding means extend over a larger axial area than the brake.
  • the brake is bridged in the axial direction.
  • the electronic circuit is releasably connected to a holding plate, which is connected to the holding means.
  • the advantage here is that the retaining plate not only improves the stability but also the magnetic shield against interference from the brake or from the stator of the motor.
  • the holding means are provided screwed into the motor flange, in particular wherein the holding means are designed as web bolts.
  • the advantage here is that simple inexpensive means can be used.
  • the electronic circuit comprises sensors for detecting the magnetic fields generated by the permanent magnets.
  • the advantage here is that the electronic circuit is already executable with evaluation, which makes the sensor signals processed and evaluated.
  • an angle-related Measured value detection such as determination of the angular position and / or the number of revolutions, executable.
  • means for determining the angular position and / or the number of revolutions of the fan are provided, in particular they are comprised by the electronic circuit or provided in the terminal box of the motor.
  • the means for determining from the past-rotating magnet are supplied, in particular they include Wiegandsensoren and / or electronic circuit in FRAM technique.
  • the advantage here is that the magnets generate by their proximity to the surface of the fan such strong magnetic fields in the range of Wiegandsensoren that out of these the electronic circuit can be supplied together with running in FRAM technology evaluation. Because the circuits implemented in FRAM technology require very little energy. Therefore, the energy pulse originating from the weighing sensor, ie pulse-wire sensors, is sufficient to supply at least one revolution counter in the electronic circuit which makes the absolute number of revolutions of the fan detectable.
  • the electrical lines of the electronic circuit comprising the lines for leading out the detected sensor signals or the line for leading out the information about angular position and / or number of revolutions, are guided in the brake and are supplied with the brake supplying and / or controlling lines led into the connection box.
  • the advantage here is that only one recess in a housing-forming part of the brake is to be used to then continue to use the lines together with the lines of the brake provided for this anyway recesses in the motor housing, comprising stator housing, terminal box and / or motor flange.
  • the terminal box of the motor has a recess for carrying out a bus line and / or the terminal box an electronic circuit with the functionality of a converter, soft starter and / or motor switch.
  • the inverter supplies the motor and includes a speed controller to which the information from the electronic circuit comprising the sensors is supplied as an actual value.
  • a speed controller to which the information from the electronic circuit comprising the sensors is supplied as an actual value.
  • the magnetization direction of the magnets are provided in the radial direction, in particular, where next adjacent magnets have opposite magnetization direction.
  • the advantage here is that the Wiegandsensoren are correspondingly radially arranged and thus the engine, in particular in the axial direction is very compact executable.
  • a fan is provided in the motor, comprising the base body and fan blades provided thereon, which are embodied in one piece as an injection molded part and encapsulated in the fan of permanent magnets.
  • the advantage here is that the fan is very inexpensive and easy to manufacture as a simultaneous angular position sensor.
  • the permanent magnets are arranged so close to the surface of the base body, that the magnets are held in the body, in particular also when operating the motor.
  • the advantage here is that the magnets emit very strong signals and thus in a close arrangement of the sensors on the surface area described a very good signal-to-noise ratio can be achieved.
  • an electronic circuit is provided axially spaced from the fan and comprises sensors which are in operative connection with the magnets, the sensors detecting the magnetic field of the magnets moving past.
  • the advantage here is that the sensors with the circuit integrated on a circuit board are executable and thus directly the sensor signals are evaluated. In this way, then the information can be generated.
  • combinations of Wiegandsensoren with Hall sensors are advantageous.
  • FIG. 1 an inventive electric motor is shown, the stator housing 1 is connected at its B-side axial end portion with the motor flange 2, on which an electromagnetically actuated brake 3 is provided.
  • This comprises an energizable coil whose magnetic field generated during energization acts on a disc such that a force acting on the disc spring force of a spring element is overcome and thus the disc is axially movable.
  • brake pads can be brought into frictional contact or alternatively the frictional contact can be separated.
  • the brake is thus electromagnetically actuated.
  • a magnetic field is generated in the axial direction, which is also variable.
  • FIG. 2 is an oblique view of the engine shown with the fan has been omitted.
  • FIG. 3a is a cut and in FIG. 3b a top view of the fan shown.
  • the fan is further provided axially remote from the engine as the brake and connected to the motor shaft 4, in particular non-positive and / or positive. Preferably, the connection is executed without play.
  • the fan comprises in its base body, which is truncated cone-like, permanent magnets 30. These are introduced into the base body in the plastic injection molding of the base body and thus completely encapsulated.
  • the smallest distance to the surface is chosen such that sufficient holding forces for the magnets 30, in particular essentially just enough holding forces for the magnets 30, are provided.
  • the electronic circuit 10 is executed encapsulated and held by spacers 9 as a holding means on the motor flange.
  • the spacers extend beyond the axial region of the brake 3, so that the electronic circuit on the one hand on Motor flange 2 is held and not on the brake 3.
  • the electronic circuit 10 between the fan and brake 3 is provided.
  • the electronic circuit 10 includes sensors for detecting the magnetic fields generated by the magnets 30.
  • a first part of the magnets 30 in the circumferential direction is regularly spaced from each other, a second part of the magnets 30 has at least one other distance to a next adjacent magnet.
  • the second part consists of a single magnet 30. In another embodiment of the invention, however, all the magnets 30 are regularly spaced from each other.
  • the sensors are arranged and their signals evaluated so that information about the angular position of the fan can be determined, in particular, an absolute revolution counter is executed integrated.
  • the brake itself includes a housing that dissipates at least a portion of the magnetic field lines, and thus reduce reduced parasitic magnetic fields.
  • the electronic circuit comprising the sensors and printed circuit board and the other components, not only well protected but also electrically well insulated against their environment. Vorzugswiese the board protrudes from the overmolded area, whereby a screw connection with the holding means 9 is providable.
  • Another advantage of the holding means 9 is that when waiting for the brake, the adjustment of the electronic circuit, comprising the sensors. Relative to the magnets of the fan does not need to be repeated because the distance is already fixed by the holding means.
  • the holding means are removed and after maintenance of the brake reassembled on the motor flange. In this case, then the adjustment of the distance between the magnet and sensors is restored.
  • the circuit board of the electronic circuit 10 is not directly attached by means of the holding means on the motor flange but the electronic circuit is attached to a holding plate, which in turn is connected to the holding means.
  • the attachment of the electronic circuit is made more stable and stiffer.
  • the retaining plate is also such between brake 3 and electronic circuit 10 can be arranged and the material of the retaining plate is selected such that the sensors are shielded by means of the retaining plate against emerging from the brake magnetic field lines.
  • the fan is on the motor shaft according to the invention by means of its shaft seat 31 force and / or positively connected.
  • stator flange On the stator flange a terminal box base 6 is provided, on which a terminal box cover 7 is provided.
  • the output end of the motor shaft protrudes from the motor A-side and is denoted by the reference numeral 8 in the FIG. 1 Provided.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)

Description

Die Erfindung betrifft einen Elektromotor.The invention relates to an electric motor.

Aus der DE 103 40 325 A1 ist ein Elektromotor bekannt, bei dem Sensoren mit einem am Lüfter vorgesehenen Ring abwechselnder Magnetisierung zusammenwirken zur Drehzahlbestimmung.From the DE 103 40 325 A1 An electric motor is known, in which sensors cooperate with a ring provided on the alternator magnetization for speed determination.

Aus der EP 1 511 157 A2 ist ein Lüftermotor bekannt, bei dem auf dem Lüfter ein Polring angordnet ist und im axialen Bereich des Lüfters eine elekttronischen Schaltung, die Sensoren zur Erfassung der vom Polring erzeugten Magnetfelder aufweist.From the EP 1 511 157 A2 a fan motor is known in which a pole ring is angordnet on the fan and in the axial region of the fan an elekttronischen circuit having sensors for detecting the magnetic fields generated by the pole ring.

Aus der WO 2006/136585 A1 ist ein Lüfter bekannt, bei dem Magnete von einem Rückschlussring gehalten sind und an ihrer restlichen Oberfläche mit Kunststoff umspritzt sind.From the WO 2006/136585 A1 a fan is known in which magnets are held by a return ring and are encapsulated on the remaining surface with plastic.

Aus der EP 1 589 641 A2 ist ein Gleichstrommotor bekannt.From the EP 1 589 641 A2 is a DC motor known.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Elektromotor mit Winkelbezogener Messwerterfassung weiterzubilden, wobei die Herstellung vereinfacht sein soll.The invention is therefore the object of developing an electric motor with angle-related measured value, the production should be simplified.

Erfindungsgemäß wird die Aufgabe bei dem Elektromotor nach den in Anspruch 1 angegebenen Merkmalen gelöst.According to the invention, the object is achieved in the electric motor according to the features indicated in claim 1.

Wichtige Merkmale der Erfindung bei dem Elektromotor sind, dass er eine Bremse und einen Lüfter umfasst, wobei der Lüfter, umfassend Grundkörper und darauf vorgesehene Lüfterflügel, einstückig als Spritzgussteil ausgeführt ist und im Lüfter Dauermagnete umspritzt vorgesehen sind,
wobei axial beabstandet vom Lüfter eine elektronische Schaltung vorgesehen ist, die mittels Haltemitteln am Motorflansch befestigt ist, der mit dem Statorgehäuse des Motors verbunden ist.Important features of the invention in the electric motor are that it comprises a brake and a fan, wherein the fan, comprising the base body and provided thereon Fan blade, is made in one piece as an injection molded part and are provided in the fan encapsulated permanent magnets,
wherein axially spaced from the fan, an electronic circuit is provided, which is fastened by means of holding means on the motor flange which is connected to the stator housing of the motor.

Von Vorteil ist dabei, dass die Magnete schon bei der Herstellung des Spritzgusses des Lüfters eingebracht werden und somit der Lüfter in einfacher Weise herstellbar, die Magnete schützbar und durch Wahl der Magnete als Dauermagnete sehr starke Magnetfelder erzeugbar sind. Außerdem ist die elektronische Schaltung eng am Lüfter vorsehbar und somit ein gutes Signal-Rausch-Verhältnis erreichbar. Die elektronische Schaltung ist mittels der Haltemitteln am Motorflansch haltbar und daher an einem festen stabilen Teil des Motors befestigbar. Außerdem ist somit eine sehr gute elektrische Masseverbindung gegeben.The advantage here is that the magnets are already introduced in the production of the injection molding of the fan and thus the fan in a simple manner produced, the magnets can be protected and by selecting the magnets as permanent magnets very strong magnetic fields can be generated. In addition, the electronic circuit is closely predictable on the fan and thus achieves a good signal-to-noise ratio. The electronic circuit is durable by means of the holding means on Motorflansch and therefore fastened to a fixed stable part of the engine. In addition, thus a very good electrical ground connection is given.

Erfindungsgemäß erstrecken sich die Haltemittel über einen größeren axialen Bereich als die Bremse. Somit wird die Bremse in axialer Richtung überbrückt. Bei Wartung oder Reparatur der Bremse bleibt die elektronische Schaltung oder zumindest ihre Justierung relativ zum Lüfter unbeeinflusst.According to the invention, the holding means extend over a larger axial area than the brake. Thus, the brake is bridged in the axial direction. During maintenance or repair of the brake, the electronic circuit or at least its adjustment relative to the fan remains unaffected.

Bei einer vorteilhaften Ausgestaltung ist die elektronische Schaltung mit einem Halteblech lösbar verbunden, das mit den Haltemitteln verbunden ist. Von Vorteil ist dabei, dass das Halteblech nicht nur die Stabilität sondern auch die magnetische Abschirmung gegen Störfelder aus der Bremse oder aus dem Stator des Motors verbessert.In an advantageous embodiment, the electronic circuit is releasably connected to a holding plate, which is connected to the holding means. The advantage here is that the retaining plate not only improves the stability but also the magnetic shield against interference from the brake or from the stator of the motor.

Bei einer vorteilhaften Ausgestaltung sind die Haltemittel in den Motorflansch eingeschraubt vorgesehen, insbesondere wobei die Haltemittel als Stegbolzen ausgeführt sind. Von Vorteil ist dabei, dass einfache kostengünstige Mittel verwendbar sind.In an advantageous embodiment, the holding means are provided screwed into the motor flange, in particular wherein the holding means are designed as web bolts. The advantage here is that simple inexpensive means can be used.

Bei einer vorteilhaften Ausgestaltung umfasst die elektronische Schaltung Sensoren zur Detektion der von den Dauermagneten erzeugten Magnetfelder. Von Vorteil ist dabei, dass die elektronische Schaltung schon mit Auswerteelektronik ausführbar ist, die die Sensorsignale verarbeitbar und auswertbar macht. Somit ist eine winkelbezogene Messwerterfassung, wie beispielsweise Bestimmung der Winkellage und/oder der Anzahl von Umdrehungen, ausführbar.In an advantageous embodiment, the electronic circuit comprises sensors for detecting the magnetic fields generated by the permanent magnets. The advantage here is that the electronic circuit is already executable with evaluation, which makes the sensor signals processed and evaluated. Thus, an angle-related Measured value detection, such as determination of the angular position and / or the number of revolutions, executable.

Bei einer vorteilhaften Ausgestaltung sind Mittel zur Bestimmung der Winkellage und/oder der Anzahl von Umdrehungen des Lüfters vorgesehen, insbesondere sind sie von der elektronischen Schaltung umfasst oder im Anschlusskasten des Motors vorgesehen. insbesondere sind die Mittel zur Bestimmung aus dem vorbeidrehenden Magneten versorgbar, insbesondere umfassen sie Wiegandsensoren und/oder elektronische Schaltung in FRAM Technik. Von Vorteil ist dabei, dass die Magnete durch ihre Nähe an der Oberfläche des Lüfters derart starke Magnetfelder im bereich der Wiegandsensoren erzeugen, dass aus diesen heraus die elektronische Schaltung samt in FRAM-Technik ausgeführte Auswerteelektronik versorgbar ist. Denn die in FRAM Technik ausgeführten Schaltkreise benötigen sehr wenig Energie. Daher genügt der aus den Wiegandsensoren, also Impulsdrahtsensoren, stammende Energiepuls zur Versorgung zumindest eines Umdrehungszählers in der elektronischen Schaltung, der die absolute Umdrehungszahl des Lüfters feststellbar macht.In an advantageous embodiment, means for determining the angular position and / or the number of revolutions of the fan are provided, in particular they are comprised by the electronic circuit or provided in the terminal box of the motor. In particular, the means for determining from the past-rotating magnet are supplied, in particular they include Wiegandsensoren and / or electronic circuit in FRAM technique. The advantage here is that the magnets generate by their proximity to the surface of the fan such strong magnetic fields in the range of Wiegandsensoren that out of these the electronic circuit can be supplied together with running in FRAM technology evaluation. Because the circuits implemented in FRAM technology require very little energy. Therefore, the energy pulse originating from the weighing sensor, ie pulse-wire sensors, is sufficient to supply at least one revolution counter in the electronic circuit which makes the absolute number of revolutions of the fan detectable.

Bei einer vorteilhaften Ausgestaltung sind die elektrischen Leitungen der elektronischen Schaltung, umfassend die Leitungen zur Herausführung der detektierten Sensorsignale oder die Leitung zur Herausführung der Information über Winkellage und/oder Anzahl von Umdrehungen, in die Bremse geführt und sind mit den die Bremse versorgenden und/oder steuernden Leitungen in den Anschlusskasten geführt. Von Vorteil ist dabei, dass nur eine Ausnehmung in einem gehäusebildenden Teil der Bremse vorzusehen ist, um dann zur Weiterführung der Leitungen gemeinsam mit den Leitungen der Bremse die hierfür sowieso vorgesehenen Ausnehmungen im Motorgehäuse, umfassend Statorgehäuse, Anschlusskaste und/oder Motorflansch zu verwenden.In an advantageous embodiment, the electrical lines of the electronic circuit, comprising the lines for leading out the detected sensor signals or the line for leading out the information about angular position and / or number of revolutions, are guided in the brake and are supplied with the brake supplying and / or controlling lines led into the connection box. The advantage here is that only one recess in a housing-forming part of the brake is to be used to then continue to use the lines together with the lines of the brake provided for this anyway recesses in the motor housing, comprising stator housing, terminal box and / or motor flange.

Bei einer vorteilhaften Ausgestaltung weist der Anschlusskasten des Motors eine Ausnehmung auf zur Durchführung einer Busleitung und/oder der Anschlusskasten einen elektronische Schaltung mit der Funktionalität eines Umrichters, Sanftanlaufgeräts und/oder Motorschalters. Von Vorteil ist dabei, dass die Information über die Winkellage und/oder Anzahl der Umdrehungen an weitere elektronische Geräte übermittelbar ist.In an advantageous embodiment, the terminal box of the motor has a recess for carrying out a bus line and / or the terminal box an electronic circuit with the functionality of a converter, soft starter and / or motor switch. The advantage here is that the information about the angular position and / or number of revolutions can be transmitted to other electronic devices.

Bei einer vorteilhaften Ausgestaltung versorgt der Umrichter den Motor und umfasst einen Drehzahlregler, dem die Informationen aus der die Sensoren umfassenden elektronischen Schaltung als Istwert zugeführt wird. Von Vorteil ist dabei, dass ein kostengünstiger Winkelsensor zu Steuerung eines Motors verwendbar ist.In an advantageous embodiment of the inverter supplies the motor and includes a speed controller to which the information from the electronic circuit comprising the sensors is supplied as an actual value. The advantage here is that a cost-effective angle sensor is used to control a motor.

Bei einer vorteilhaften Ausgestaltung sind die Magnetisierungsrichtung der Magnete in radialer Richtung vorgesehen, insbesondere wobei nächstbenachbarte Magnete entgegengesetzte Magnetisierungsrichtung aufweisen. Von Vorteil ist dabei, dass die Wiegandsensoren entsprechend radial anordenbar sind und somit der Motor insbesondere in axialer Richtung sehr kompakt ausführbar ist.In an advantageous embodiment, the magnetization direction of the magnets are provided in the radial direction, in particular, where next adjacent magnets have opposite magnetization direction. The advantage here is that the Wiegandsensoren are correspondingly radially arranged and thus the engine, in particular in the axial direction is very compact executable.

Bei einer vorteilhaften Ausgestaltung ist ein Lüfter im Motor vorgesehen, umfassend Grundkörper und darauf vorgesehene Lüfterflügel, die einstückig als Spritzgussteil ausgeführt und im Lüfter Dauermagnete umspritzt vorgesehen sind. Von Vorteil ist dabei, dass der Lüfter sehr kostengünstig und einfach herstellbar ist als gleichzeitiger Winkellagengeber.In an advantageous embodiment, a fan is provided in the motor, comprising the base body and fan blades provided thereon, which are embodied in one piece as an injection molded part and encapsulated in the fan of permanent magnets. The advantage here is that the fan is very inexpensive and easy to manufacture as a simultaneous angular position sensor.

Bei einer vorteilhaften Ausgestaltung sind die Dauermagnete derart nahe an der Oberfläche des Grundkörpers angeordnet, dass die Magnete im Grundkörper gehalten sind, insbesondere auch beim Betreiben des Motors. Von Vorteil ist dabei, dass die Magnete sehr starke Signale abgeben und somit bei naher Anordnung der Sensoren an dem beschriebenen Oberflächenbereich eine sehr gutes Signal-Rauschverhältnis erreichbar ist.In an advantageous embodiment, the permanent magnets are arranged so close to the surface of the base body, that the magnets are held in the body, in particular also when operating the motor. The advantage here is that the magnets emit very strong signals and thus in a close arrangement of the sensors on the surface area described a very good signal-to-noise ratio can be achieved.

Erfindungsgemäß ist axial beabstandet vom Lüfter eine elektronische Schaltung vorgesehen, die Sensoren umfasst welche in Wirkverbindung mit den Magneten stehen, wobei die Sensoren das Magnetfeld der sich vorbei bewegenden Magnete detektieren. Von Vorteil ist dabei, dass die Sensoren mit der Schaltung integriert auf einer Leiterplatte ausführbar sind und somit direkt die Sensorsignale auswertbar sind. Auf diese Weise ist dann die Information erzeugbar. Als Sensoren sind auch Kombinationen von Wiegandsensoren mit Hallsensoren vorteilhaft.According to the invention, an electronic circuit is provided axially spaced from the fan and comprises sensors which are in operative connection with the magnets, the sensors detecting the magnetic field of the magnets moving past. The advantage here is that the sensors with the circuit integrated on a circuit board are executable and thus directly the sensor signals are evaluated. In this way, then the information can be generated. As sensors, combinations of Wiegandsensoren with Hall sensors are advantageous.

Die Erfindung wird nun anhand von Abbildungen näher erläutert:
In der Figur 1 ist ein erfindungsgemäßer Elektromotor gezeigt, dessen Statorgehäuse 1 an seinem B-seitigen axialen Endbereich mit dem Motorflansch 2 verbunden ist, an dem eine elektromagnetisch betätigbare Bremse 3 vorgesehen ist. Diese umfasst eine bestrombar spule, deren bei Bestromung erzeugtes Magnetfeld auf eine Scheibe derart wirkt, dass eine ebenfalls auf die Scheibe wirkende Federkraft eines Federelements überwunden wird und somit die Scheibe axial bewegbar wird. Auf diese Weise werden Bremsbeläge in Reibkontakt bringbar oder alternativ der Reibkontakt trennbar. Die Bremse ist also elektromagnetisch betätigbar. Abhängig von der Bestromung entsteht also ein Magnetfeld in axialer Richtung, das auch veränderlich ist.The invention will now be explained in more detail with reference to figures:
In the FIG. 1 an inventive electric motor is shown, the stator housing 1 is connected at its B-side axial end portion with the motor flange 2, on which an electromagnetically actuated brake 3 is provided. This comprises an energizable coil whose magnetic field generated during energization acts on a disc such that a force acting on the disc spring force of a spring element is overcome and thus the disc is axially movable. In this way, brake pads can be brought into frictional contact or alternatively the frictional contact can be separated. The brake is thus electromagnetically actuated. Depending on the current flow, a magnetic field is generated in the axial direction, which is also variable.

In Figur 2 ist eine Schrägansicht des Motors gezeigt, wobei der Lüfter weggelassen wurde.In FIG. 2 is an oblique view of the engine shown with the fan has been omitted.

In Figur 3a ist ein Schnitt und in Figur 3b eine Draufsicht des Lüfters gezeigt.In FIG. 3a is a cut and in FIG. 3b a top view of the fan shown.

Der Lüfter ist weiter axial als die Bremse abgewandt vom Motor vorgesehen und mit der Motorwelle 4 verbunden, insbesondere kraft- und/oder formschlüssig. Vorzugsweise ist die Verbindung spielfrei ausgeführt.The fan is further provided axially remote from the engine as the brake and connected to the motor shaft 4, in particular non-positive and / or positive. Preferably, the connection is executed without play.

Mittels der Lüfterflügel 5 wird Luft in axialer Richtung gefördert und der Motor ist durch diese entlang seiner im Statorgehäuse 1 vorgesehenen Rippen kühlbar.By means of the fan blades 5, air is conveyed in the axial direction and the motor can be cooled by these along its ribs provided in the stator housing 1.

Des Weiteren umfasst der Lüfter in seinem Grundkörper, der kegelstumpfähnlich ausgeführt ist, Permanentmagnete 30. Diese sind im Grundkörper beim Kunststoffspritzgießen des Grundkörpers eingebracht und somit vollständig umspritzt. Dabei ist der geringste Abstand zur Oberfläche derart gewählt, dass genügende Haltekräfte für die Magnete 30, insbesondere im Wesentlichen gerade noch genügende Haltekräfte für die Magnete 30, vorgesehen sind.Furthermore, the fan comprises in its base body, which is truncated cone-like, permanent magnets 30. These are introduced into the base body in the plastic injection molding of the base body and thus completely encapsulated. In this case, the smallest distance to the surface is chosen such that sufficient holding forces for the magnets 30, in particular essentially just enough holding forces for the magnets 30, are provided.

Die elektronische Schaltung 10 ist umspritzt ausgeführt und von Abstandsbolzen 9 als Haltemittel am Motorflansch gehalten. Dabei erstrecken sich die Abstandsbolzen über den axialen Bereich der Bremse 3 hinweg, so dass die elektronische Schaltung einerseits am Motorflansch 2 gehalten ist und nicht an der Bremse 3. Andererseits ist es ermöglicht, dass die elektronische Schaltung 10 zwischen Lüfter und Bremse 3 vorgesehen. Die elektronische Schaltung 10 umfasst Sensoren zur Detektion der von den Magneten 30 erzeugten Magnetfeldern. Dabei ist ein erster Teil der Magnete 30 in Umfangsrichtung regelmäßig voneinander beabstandet, ein zweiter Teil der Magnete 30 weist zumindest einen anderen Abstand zu einem nächstbenachbarten Magnet auf. Insbesondere besteht der zweite Teil aus einem einzigen Magneten 30. Bei einem anderen erfindungsgemäßen Ausführungsbeispiel sind alle Magnete 30 hingegen regelmäßig voneinander beabstandet.The electronic circuit 10 is executed encapsulated and held by spacers 9 as a holding means on the motor flange. In this case, the spacers extend beyond the axial region of the brake 3, so that the electronic circuit on the one hand on Motor flange 2 is held and not on the brake 3. On the other hand, it is possible that the electronic circuit 10 between the fan and brake 3 is provided. The electronic circuit 10 includes sensors for detecting the magnetic fields generated by the magnets 30. In this case, a first part of the magnets 30 in the circumferential direction is regularly spaced from each other, a second part of the magnets 30 has at least one other distance to a next adjacent magnet. In particular, the second part consists of a single magnet 30. In another embodiment of the invention, however, all the magnets 30 are regularly spaced from each other.

Die Sensoren sind derart angeordnet und ihre Signale derart ausgewertet, dass eine Information über die Winkellage des Lüfters bestimmbar ist, insbesondere ist ein absoluter Umdrehungszähler integriert ausgeführt.The sensors are arranged and their signals evaluated so that information about the angular position of the fan can be determined, in particular, an absolute revolution counter is executed integrated.

Da der Abstand zwischen den Magneten 30 und den Sensoren klein vorgesehen ist, insbesondere kleiner als der Abstand zwischen der Spule der Bremse und den Sensoren der elektronischen Schaltung, ist die Fehlerrate beim Erkennen der von den Magneten 30 verursachten Magnetfeldänderung verringert. Denn die Störstrahlung aus der Bremse heraus ist nur gering. Insbesondere umfasst die Bremse selbst ein Gehäuse, das zumindest einen Teil der Magnetfeldlinien ableitet, und somit verringerte Stör-Magnetfelder austreten.Since the distance between the magnets 30 and the sensors is made small, in particular, smaller than the distance between the coil of the brake and the sensors of the electronic circuit, the error rate in detecting the magnetic field change caused by the magnets 30 is reduced. Because the interference from the brake out is only small. In particular, the brake itself includes a housing that dissipates at least a portion of the magnetic field lines, and thus reduce reduced parasitic magnetic fields.

Durch die Umspritzung mit Kunststoff ist die elektronischen Schaltung, umfassend der Sensoren und Leiterplatte sowie der weiteren Bauelemente, nicht nur gut geschützt sondern auch elektrisch gut isoliert gegen ihre Umgebung. Vorzugswiese ragt die Platine aus dem umspritzten Bereich heraus, wodurch ein Schraubverbindung mit den Haltemitteln 9 vorsehbar ist.By overmolding with plastic, the electronic circuit comprising the sensors and printed circuit board and the other components, not only well protected but also electrically well insulated against their environment. Vorzugswiese the board protrudes from the overmolded area, whereby a screw connection with the holding means 9 is providable.

Weiterer Vorteil der Haltemittel 9 ist, dass beim Warten der Bremse die Justierung der elektronischen Schaltung, umfassend die Sensoren. Relativ zu den Magneten des Lüfters nicht wiederholt werden muss, da der Abstand schon durch die Haltemittel festlegbar ist.Another advantage of the holding means 9 is that when waiting for the brake, the adjustment of the electronic circuit, comprising the sensors. Relative to the magnets of the fan does not need to be repeated because the distance is already fixed by the holding means.

Bei einer vorteilhaften Ausführung ist sogar die Bremse wartbar, während die Haltemittel unverändert mit dem Motorflansch verbunden bleiben, bei einer anderen alternativen vorteilhaften Ausführung werden die Haltemittel abmontiert und nach Wartung der Bremse wieder anmontiert an den Motorflansch. Dabei ist dann die Justierung des Abstandes zwischen Magneten und Sensoren wieder hergestellt.In an advantageous embodiment, even the brake is maintainable, while the holding means remain unchanged connected to the motor flange, in another alternative advantageous embodiment, the holding means are removed and after maintenance of the brake reassembled on the motor flange. In this case, then the adjustment of the distance between the magnet and sensors is restored.

Bei einem weiteren erfindungsgemäßen Ausführungsbeispiel wird die Leiterplatte der elektronischen Schaltung 10 nicht direkt mittels der haltemittel am Motorflansch befestigt sondern die elektronische Schaltung wird an einem Halteblech befestigt, das wiederum mit den Haltemitteln verbunden ist. Somit ist die Befestigung der elektronischen Schaltung stabiler und steifer ausgeführt. Das Halteblech ist außerdem derart zwischen Bremse 3 und elektronischer Schaltung 10 anordenbar und das Material des Haltebleches derart wählbar ist, dass die Sensoren mittels des Haltebleches gegen aus der Bremse austretende Magnetfeldlinien abgeschirmt werden.In a further embodiment of the invention, the circuit board of the electronic circuit 10 is not directly attached by means of the holding means on the motor flange but the electronic circuit is attached to a holding plate, which in turn is connected to the holding means. Thus, the attachment of the electronic circuit is made more stable and stiffer. The retaining plate is also such between brake 3 and electronic circuit 10 can be arranged and the material of the retaining plate is selected such that the sensors are shielded by means of the retaining plate against emerging from the brake magnetic field lines.

Der Lüfter ist auf der Motorwelle erfindungsgemäß mittels seiner Wellenaufnahme 31 kraft- und/oder formschlüssig verbunden.The fan is on the motor shaft according to the invention by means of its shaft seat 31 force and / or positively connected.

Auf dem Statorflansch ist ein Anschlusskastenunterteil 6 vorgesehen, auf dem ein Anschlusskastendeckel 7 vorgesehen ist.On the stator flange a terminal box base 6 is provided, on which a terminal box cover 7 is provided.

Das abtriebsseitige Ende der Motorwelle ragt aus dem Motor A-seitig heraus und ist mit dem Bezugszeichen 8 in der Figur 1 versehen.The output end of the motor shaft protrudes from the motor A-side and is denoted by the reference numeral 8 in the FIG. 1 Provided.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

  • 1 Statorgehäuse1 stator housing
  • 2 Motorflansch2 motor flange
  • 3 Bremse, elektromagnetisch betätigbar3 brake, electromagnetically actuated
  • 4 Motorwelle4 motor shaft
  • 5 Lüfterflügel5 fan blades
  • 6 Anschlusskastenunterteil6 Terminal box base
  • 7 Anschlusskastendeckel7 terminal box cover
  • 8 Motorwelle8 motor shaft
  • 9 Abstandsbolzen als Haltemittel9 Spacer bolts as holding means
  • 10 umspritzte elektronische Schaltung10 overmolded electronic circuit
  • 31 Wellenaufnahme31 wave recording
  • 30 Dauermagnete30 permanent magnets

Claims (9)

  1. Electric motor comprising a brake (3) and a fan,
    the fan, which comprises a main body and fan blades (5) provided thereon, being designed in a single piece as an injection moulded part and permanent magnets (30) being provided on the fan, an electronic circuit (10) being provided at an axial spacing from the fan and comprising sensors that are operatively connected to the magnets (30), the sensors detecting the magnetic field of the magnets (30) rotating past them, the fan being frictionally connected and/or integrally bonded to the motor shaft by means of a shaft support,
    characterised in that
    the permanent magnets (30) are provided in the fan in an overmoulded manner, the electronic circuit (10) being at an axial spacing from the fan and being attached by retaining means to the motor flange (2), which is connected to the stator housing (1) of the motor, the retaining means extending over a larger axial range than the brake (3) and thus bypassing said brake and forming an earth connection for the electronic circuit (10).
  2. Electric motor according to claim 1,
    characterised in that
    the electronic circuit (10) is releasably connected to a retaining plate connected to the retaining means.
  3. Electric motor according to at least one of the preceding claims,
    characterised in that
    the retaining means are provided screwed into the motor flange (2), the retaining means in particular being designed as stud pins.
  4. Electric motor according to at least one of the preceding claims,
    characterised in that
    means for determining the angular position and/or the number of revolutions of the fan are provided, said means in particular being comprised by the electronic circuit (10) and/or being provided in the motor junction box.
  5. Electric motor according to claim 4,
    characterised in that
    the means for determining the angular position can be powered by the magnets (30) rotating past them and in particular comprise Wiegand sensors and/or an electronic circuit (10) using FRAM technology.
  6. Electric motor according to at least one of the preceding claims,
    characterised in that
    the electrical lines of the electronic circuit (10), including the lines for outputting the detected sensor signals or the line for outputting the information on the angular position and/or number of revolutions, are guided into the brake (3) and are guided into the junction box together with the lines that power and/or control the brake (3).
  7. Electric motor according to at least one of the preceding claims,
    characterised in that
    the motor junction box has a recess for feeding through a bus line and/or the junction box comprises an electronic circuit (10) having the functionality of a converter, a soft-start device and/or a motor control switch.
  8. Electric motor according to at least one of the preceding claims,
    characterised in that
    a converter powers the motor and comprises a speed regulator, to which the information from the electronic circuit (10) comprising the sensors is supplied as an actual value.
  9. Electric motor according to at least one of the preceding claims,
    characterised in that
    the permanent magnets (30) are arranged close to the surface of the main body in such a way that the magnets (30) are retained in the main body, in particular also when the motor is in operation.
EP08716008.1A 2007-02-28 2008-02-25 Electric motor Active EP2130289B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007010004 2007-02-28
PCT/EP2008/001462 WO2008104345A2 (en) 2007-02-28 2008-02-25 Electric motor

Publications (2)

Publication Number Publication Date
EP2130289A2 EP2130289A2 (en) 2009-12-09
EP2130289B1 true EP2130289B1 (en) 2019-04-10

Family

ID=39537885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08716008.1A Active EP2130289B1 (en) 2007-02-28 2008-02-25 Electric motor

Country Status (3)

Country Link
EP (1) EP2130289B1 (en)
DE (1) DE102008010913A1 (en)
WO (1) WO2008104345A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012206898A1 (en) * 2012-04-26 2013-10-31 Robert Bosch Gmbh Electrical machine e.g. electric steering motor for motor vehicle, has fan blades which are arranged on rotational angle transmitter wheel in circumferential direction and are associated with fan wheel which surrounds transmitter wheel
DE102013208538A1 (en) 2013-05-08 2014-11-13 Lenze Drives Gmbh drive system
EP3731385A1 (en) * 2019-04-24 2020-10-28 Siemens Aktiengesellschaft Improved arrangement of a motor-inverter unit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4073759B2 (en) * 2002-11-07 2008-04-09 三菱電機株式会社 Rotating electric machine for vehicles
DE10362051B4 (en) * 2003-08-29 2016-05-19 Sew-Eurodrive Gmbh & Co Kg Electric motor and method of manufacture
DE10340325B4 (en) 2003-08-29 2009-04-09 Sew-Eurodrive Gmbh & Co. Kg electric motor
DE102004019636B4 (en) * 2004-04-22 2008-04-30 Minebea Co., Ltd. Brushless DC motor and method for adjusting a sensor device in a brushless DC motor
DE202005010000U1 (en) * 2005-06-23 2006-11-09 Ebm-Papst Mulfingen Gmbh & Co. Kg Rotor with fan wheel for an electronically commutated electric motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2008104345A3 (en) 2008-11-20
DE102008010913A1 (en) 2008-09-11
EP2130289A2 (en) 2009-12-09
WO2008104345A2 (en) 2008-09-04

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